Diamond



FIG. 1 is a top view of a diamond showing the present new design;

FIG. 2 is a front side view thereof; and,

FIG. 3 is a bottom view thereof.

The rear side view thereof, left side view thereof, and right side view thereof are the same of the front side view thereof showed by the FIG. 2. 

The ornamental design for the diamond, as shown and described. 